Dublin Travel Guide - Weather
The winter months, November through February, can be cold and wet with bitterly cold winds and daytime temperatures often reaching lows of 4°C. Snow is not common, but you should still make sure that you come well-prepared with warm clothing if you are visiting at this time.
Rain is common all year in Dublin, with summer and winter experiencing the most rainfall. Dublin may be one of the drier destinations in Ireland, but you should still ensure that you bring an umbrella and waterproofs if you intend on trekking around the sights.